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rsa_cli.c
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rsa_cli.c
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/************************************************************************************
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
作者：李恒林 henglinli@gmail.com
************************************************************************************/
#include <stdio.h>
#include <errno.h>
#include "io.h"
#include "gen_key.h"
#include "rsa.h"
//主函数
int main(int argc, char* argv[])
{
printf("***********************************\n");
printf(">李恒林 hegnlinli@gmail.com\n");
printf("***********************************\n");
printf(">该软件为开源软件,遵循GPL.下载地址为:\n");
printf("***********************************\n");
fprintf (stderr,">用法:\n>加密:\n>rsa <inputfile.txt>,\n>inputfile.txt是要加密的文件,\n>生成3个文件,分别为:\n>加密后的文件encrypted_file.txt,\n>公钥文件public_key.txt,\n>私钥文件private_key.txt.\n");
fprintf (stderr,">解密:\n>(1)rsa <private_key.txt> <encrypted_file.txt>,\n>公钥文件public_key.txt,\n>私钥文件private_key.txt.\n>(2)rsa d <encrypted_file.txt>,\n>公钥文件public_key.txt,\n>私钥文件private_key.txt,\n>private_key.txt为私钥文件,\n>使用参数d时默认私钥文件为private_key.txt,\n>输出解密后的文件为outputfile.txt.\n");
int source,
encryption;
mpz_t RSAn,
decryption,
secret;
//初始化大数,分配内存空间
mpz_init(RSAn);
mpz_init(decryption);
mpz_init(secret);
//没有指定要加密的文件
//要求输入文件名
if(argc == 1)
{
// 打开文件,读取数据
input_file();
}
//指定了加密文件，则先生成公钥和私钥，
//再加密文件并输出加密后的文件。
else if (argc==2)
{
// 打开文件,读取数据
if ( ( fp_read=fopen ( argv[1] , "r" ) ) == NULL )
{
printf( ">文件%s没有找到.\n",argv[1]);
perror("fopen");
exit(errno);
}
}
else if (argc==3)
{
//先读取私钥文件默认为private_key.txt
// 打开文件,读取数据
//printf("argv[1]=%s\n",argv[1]);
//printf("argv[2]=%s\n",argv[2]);
if(*argv[1]=='d')
{
if((fp_read= fopen("private_key.txt", "r")) == NULL )
{
printf( ">文件private_key.txt没有找到.\n");
exit(errno);
}
}
else
{
if ( (fp_read=fopen(argv[1], "r")) == NULL )
{
printf( ">文件%s没有找到.\n",argv[1]);
perror("fopen");
exit(errno);
}
}
//读取RSAn和dedecryption
gmp_fscanf(fp_read,"%Zd",RSAn);
//gmp_printf("RSAn=\n%Zd\n",RSAn);
gmp_fscanf(fp_read,"%Zd",decryption);
//gmp_printf("decryption=\n%Zd\n",decryption);
//关闭访问的文件
close_read_file();
/*********************************************************/
//解密加密的文件默认为encrypted_file.txt
// 打开文件,读取数据
printf(">解密中......\n");
if((fp_read= fopen(argv[2], "r")) == NULL )
{
printf( ">文件%s没有找到.\n",argv[2] );
perror("fopen");
exit(errno);
}
unsigned long //character_couts,
result;
char outputfile_name[]={"outputfile.txt"};
//fseek(fp_read,0L,2);
//fscanf_s(fp_read,"%d",&character_cout);
//gmp_fscanf(fp_read,"%Zd",secret);
//character_couts=mpz_get_ui(secret);
//rewind(fp_read);
//printf("character_couts=%d\n",character_couts);
//gmp_fscanf(fp_read,"%Zd",secret);
write_file(outputfile_name);
while (1)//character_couts);
{
//character_couts--;
if (gmp_fscanf(fp_read,"%Zd",secret)==EOF)
break;
//gmp_printf("secret=\n%Zd\n",secret);
result=RSA_decryption(secret,decryption,RSAn);
//printf("result=%d\n",result);
//printf("result mod 256=%d\n",result%256);
//printf("g=%d\n",'g');
fputc(result,fp_write);
}
//printf("%c\n",result);
//关闭访问的文件
close_read_file();
close_write_file();
//销毁大数,释放内存空间
mpz_clear(RSAn);
mpz_clear(decryption);
mpz_clear(secret);
//system("pause");
return 0;
}
else
//参数错误则提示用法
{
fprintf (stderr, "*******************************\n>出错啦!\n*******************************\n");
//fprintf (stderr,">用法:\n>加密:\n>rsa <inputfile.txt>,\n>inputfile.txt是要加密的文件,\n>生成3个文件,分别为:\n>加密后的文件encrypted_file.txt,\n>公钥文件public_key.txt,\n>私钥文件private_key.txt.\n");
//fprintf (stderr,">解密:\n>(1)rsa <private_key.txt> <encrypted_file.txt>,\n>公钥文件public_key.txt,\n>私钥文件private_key.txt.\n>(2)rsa d <encrypted_file.txt>,\n>公钥文件public_key.txt,\n>私钥文件private_key.txt,\n>private_key.txt为私钥文件,\n>使用参数d时默认私钥文件为private_key.txt,\n>输出解密后的文件为outputfile.txt.\n");
return errno;
}
//先生成公钥和私钥，并输出为两个文件，
//分别为：pulic_key.txt和private_key.txt
//
//公钥为(RSAn,encryption)私钥为(RSAn,decryption)
//
encryption=gen_key(RSAn,decryption);
//等加密完成输出加密后的文件,才生成秘钥文件.
/*******************************************************/
//该段生成加密后的文件encrypted_file.txt
//unsigned long character_couts;
char tmp_char,
encrypted_file_name[]={"encrypted_file.txt"};
write_file(encrypted_file_name);
tmp_char=fgetc(fp_read);
//character_couts=0;
while (tmp_char!=EOF)
{
//character_couts++;
source=tmp_char;
RSA_encryption(source,encryption,RSAn,secret);
//写入文件
// int gmp_fprintf (FILE *fp,const char *fmt,... )
//Print to the stream fp. Return the number of characters written,
//or −1 if an error occurred.
gmp_fprintf(fp_write,"%Zd\n",secret);
/**************************************************
//该方法为老版本的.
//size_t mpz_out_str (FILE *stream,int base,mpz_t op)
//Output op on stdio stream stream,as a string of digits in base base.
if ((size=mpz_out_str(fp_write,62,secret))==0)
{
printf(">写入文件encrypted_file.txt出错.\n");
exit(0);
}
//gmp_fprintf(fp_write,"%Zd",secret);
//fprintf(fp_write,"\n");
//printf("%d\n",size);
/*************************************************/
tmp_char=fgetc(fp_read);
}
//在文件头/尾写入加密字符的个数
//fseek(fp_write,0L,2);
//rewind(fp_write);
//fprintf(fp_write,"%d\n",character_couts);
/*********************************************************/
//该段生成公钥文件public_key.txt
//格式为:
//RSAn
//encryption
char public_key_name[]={"public_key.txt"};
write_file(public_key_name);
gmp_fprintf(fp_write,"%Zd\n",RSAn);
//fprintf(fp_write,"\n");
fprintf(fp_write,"%d",encryption);
/*********************************************************/
//该段生成私钥文件private_key.txt
//格式为:
//RSAn
//decryption
char private_key_name[]={"private_key.txt"};
write_file(private_key_name);
gmp_fprintf(fp_write,"%Zd\n",RSAn);
//fprintf(fp_write,"\n");
gmp_fprintf(fp_write,"%Zd",decryption);
//关闭访问的文件
close_write_file();
close_read_file();
//销毁大数,释放内存空间
mpz_clear(RSAn);
mpz_clear(decryption);
mpz_clear(secret);
//system("pause");
return 0;
}